The 1991 Lexus ES 250 contains a 2.5L V6 engine. This engine is a freewheeling engine, which implies that ought to the timing belt stretch previous its helpful life, the possibilities that the valves will hit the pistons, inflicting intensive engine harm, is low. Lexus recommends altering the timing belt on this type each 60,000 miles or seventy two months, whichever comes first. The process takes three particular instruments which are all accessible at a Lexus dealership. It takes about three half of hours to exchange the timing belt.
Lexus ES 250 Install the Timing Belt Instructions
Disconnect the negative battery cable and lay it to the facet, guaranteeing that it doesn’t contact steel. Watch for 20 seconds to start work, to permit the airbag to disarm itself. Utilizing the applicable sockets and wrenches, take away the front suspension higher brace, and the cruise management actuator mud cowl. Pull the vacuum hoses off and unplug the wiring harness pigtail from the actuator. Remove the actuator and its bracket, utilizing the acceptable sockets.
Unplug the cruise management vacuum pump connector, then take away the pump and its bracket, utilizing the acceptable sockets. Remove the bolts from the energy steering reservoir tank, however don’t take away the hoses. Lay the tank out of the approach.
Elevate the ES 250 with the flooring jack and assist it with jack stands. Remove the proper front wheel, utilizing the lug wrench. Remove the proper front fender apron and its seal. Utilizing a wrench, push the accent belt tensioner pulleys away from the belt. Remove the accent belts. Remove the proper engine stays.
Assist the engine with the flooring jack by jacking it up simply sufficient to the touch the backside of the oil pan. Remove the proper engine mount insulator, utilizing the applicable socket.
Remove the air consumption chamber by disconnecting the accelerator cable and the throttle cable. Unbolt the air cleaner cowl, air move meter and the air consumption hose. Remove all three items, taking care to not jar the air move meter. Disconnect the PVC hoses, vacuum sensing hose, water bypass hose, gasoline strain VSV hose, emission management vacuum hoses, ISC connector and the throttle place sensor connector. Additionally, disconnect the chilly begin injector connector, the gasoline hose, the brake booster vacuum hose, the energy steering vacuum and air hoses, the floor strap connector, the wire harness clamp and the EGR pipe. Remove the No. 1 engine hanger and the air consumption chamber keep, then take away the air consumption chamber.
Remove the higher timing belt cowl and its seal. Remove the proper engine mounting bracket, utilizing the acceptable socket. Flip the crankshaft clockwise till the timing marks on each camshafts and the crankshaft are lined up. The crankshaft has a notch. Line the notch up with the zero mark on the gauge at the 2 o’clock place. The camshaft sprockets have a line on one in all the enamel. The road on every camshaft sprocket traces up with a dot on every head at the 12 o’clock place. Maintain the crankshaft pulley with the particular crankshaft holding software and the pulley device deal with. Remove the pulley bolt. Pull the crankshaft pulley off utilizing the particular puller. Remove the lower timing belt cowl, utilizing the applicable socket. Take a look at the marks on the timing belt: They need to be lined up with the timing marks on the sprockets. Remove the timing belt.
Remove the mud boot and the auto tensioner, then verify for oil leakage. If the tensioner is leaking, change it. Push the pushrod towards a wall or desk. In case you can transfer the pushrod, exchange the tensioner. Measure the pushrod. If the measurement doesn’t fall between zero.413 and zero.453 inches, substitute the auto tensioner. Place a washer on the finish of the tensioner to guard the plug. Put the tensioner in the hydraulic press. Push the pushrod in till the gap in the pushrod strains up with the gap in the tensioner physique. Insert an Allen wrench in the holes to carry the pushrod in. Put the mud boot again on the tensioner. Test that the timing marks are nonetheless lined up.
Install the timing belt, working counterclockwise, beginning at the crankshaft pulley. Protecting the belt tight, work your method behind the water pump pulley, over the prime of the proper camshaft (as you’re looking down at the engine), below the loafer pulley, over the prime of the left camshaft sprocket and down behind the tensioner.
Install the auto tensioner and tighten the bolts to twenty foot-lbs. of torque. Remove the Allen wrench, permitting the tensioner to place rigidity on the belt. Install the lower timing belt cowl, utilizing the applicable socket. Install the crankshaft pulley. Recheck all the timing marks to make sure they’re nonetheless lined up, together with the mark on the tensioner. Flip the crankshaft clockwise two turns till the 4 timing marks are lined up. If the marks don’t line up, take away the belt and repeat the set up course of.
Install the remainder of the elements in reverse order of removing. When working with the higher timing belt cowl, make sure that the bolts are positioned in the proper spot. The shortest bolts go on the prime, the longer bolt with the shank goes in the center, and the final bolt goes in the backside of the higher timing cowl. Maintain the crankshaft pulley with the particular holding device and pulley software deal with. Tighten the crankshaft pulley bolt to 181 foot-lbs. of torque.
Flip the ignition swap to the “Lock” place. Reconnect the battery floor cable. Wait at the least 10 seconds earlier than turning the ignition change from the “Lock” place.
[source ehow.com]
